HVAC Contractors: Unraveling Dirty Air Filters

The air filter is one of the major components of an air conditioner. When it’s dirty, it tends to bring the air conditioner to a halt. According to HVAC contractors, there are many things that can cause your air filter to get dirty.

Things that make your air conditioner dirty

One of the things that can make the air filter dirty is pet hair. As you know, pets shed and if you have one that sheds a lot, you should expect the hair to be caught by the air conditioner air filters. To minimize the chances of the problem coming about you need to vacuum your house daily.

Another factor that will contribute to the clogging of the air filter is extreme temperatures. Even if you have set your fan to “auto,” if it’s too hot or cold, the fan will continue working. To fix this problem you need to shorten the replacement intervals until the seasons change.

The final one is a dusty home. This is common if you just had a home construction project or there is excessive dust in one of the rarely used rooms of the house. According to AC contractors, if you have a lot of dust that you haven’t vacuumed, chances are that it will end up in the air filter.

Effects of dirty filters

There are many effects that come with dirty air filters. Some of these effects include:

Compromised efficiency: When the air filters are dirty, it means that the air conditioner works harder than it should. The end result is the air conditioner consuming a lot of energy.

Short cycling: Short cycling comes about when the air conditioner cycle stops before it hits its temperature goal. This happens due to a clogged air filter. The materials trapped inside the air conditioner filter trick the system to stop the cycle to avoid overheating.

When the air conditioner continues doing this over a long period of time, there is excessive wear on the system components.

Frozen coils: During the cooling season, the air filters also tend to trap cooled air which results in frost buildup on the evaporator coils and condenser. When the frost continues to build, the air conditioner might seize up.


This is what you need to know about dirty air filters. For ideal results keeping your air conditioner in top shape, work with a reputable HVAC company.

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